This thread can be closed.
Originally, I installed another plugin (Custom Post Type Permalinks) to help to have different permalink for my blog posts and for my listings. It worked well.
But it corrupted the geodirectory files when I downloaded the above mentioned additional addons. Deleting the Custom Post Type Permalinks plugin now, it works well still. I suppose with the custom post types, geodirectory had its own solution for this.
Thanks anyways 🙂